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FAIR VALUE OF FINANCIAL INSTRUMENTS, Carrying Amount of Contingent Consideration Liabilities (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2021
Other liabilities contingent consideration [Abstract] |  |
Assumed percentage of royalty revenue until 2029 |  | 13.00%
Assumed percentage of royalty revenue from 2030 to 2038 |  | 7.00%
Percentage of royalty revenue post patent decline for first year |  | 50.00%
Percentage of royalty revenue post patent decline after year one |  | 10.00%
Percentage of income taxes projected as royalty savings |  | 26.00%
Percentage of weighted average cost of capital |  | 26.00%
Level 3 [Member] |  |
Other liabilities contingent consideration [Abstract] |  |
Balance at beginning of period |  | $ 20,110,000
Balance at end of period | $ 19,360,000 | 19,360,000
Level 3 [Member] | Contingent Consideration [Member] |  |
Other liabilities contingent consideration [Abstract] |  |
Balance at beginning of period | 19,290,000 | 20,110,000
Fair value adjustment included in operating expenses | 70,000 | (750,000)
Balance at end of period | $ 19,360,000 | $ 19,360,000

X
- Definition Percentage of income taxes projected in terms of royalty savings due to use of different market assumptions and/or different valuation techniques. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

X
- Definition The percentage of royalty revenue assumed from 2030 to 2038 due to use of different market assumptions and/or different valuation techniques. + References No definition available. + Details
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Namespace Prefix: | btx_
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- Definition The percentage of royalty revenue assumed until 2029 due to use of different market assumptions and/or different valuation techniques. + References No definition available. + Details
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- Definition The percentage of royalty revenue after year one post patent decline due to use of different market assumptions and/or different valuation techniques. + References No definition available. + Details
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- Definition The percentage of royalty revenue for first year post patent decline due to use of different market assumptions and/or different valuation techniques. + References No definition available. + Details
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Namespace Prefix: | btx_
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Period Type: | duration

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- Definition Cash flows discounted by the liability specific weighted average cost of capital using the mid-point convention. + References No definition available. + Details
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Balance Type: | na
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- Definition Amount of addition (reduction) to the amount at which a liability could be incurred (settled) in a current transaction between willing parties. + References No definition available. + Details
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- Definition Fair value of financial and nonfinancial obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- References No definition available. + Details
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- Details
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- Details
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